The question is asking "how many substances has their mass recorded" to find the answer you would simply count how many substances (the dots above the graph) there are. After counting you will see that there are 13 which is the answer to your question.
Hope this helps! :)
Step-by-step explanation:
Let the first angle be x,
second angle= x-45.6°
Now,
x+(x-45.6)°=90°
x+x-45.6°=90°
2x-45.6°=90°
2x=90°+45.6°
2x=135.6
x=135.6/2
x=67.8
Hence,
First angle= x= 67.8°
Second angle= x-45.6°= 67.8°-45.6°= 22.2°
Total Units = 4+5+9 = 18
so, 1 unit value = 180/18 = 10
Degrees will be : 4(10), 5(10), 9(10) = 40, 50 , 90
Answer: Meaghan is right.
Step-by-step explanation:
For a number like:
123.45
the tens place would be the "2" (second number at the left of the decimal point)
The ones place would be the "3" (first number at the left of the decimal point)
Let's suppose that Lily is correct.
Then the quotient of:
43.61/7
Will be a number with two digits in the left of the decimal point.
The smallest number that meets this condition, is the number 10.
Then let's see:
7*10 = 70
then:
70/7 = 10
and:
43.61 < 70
(70 is larger than 43.61)
then:
43.61/7 < 70/7 = 10
Then:
(43.61/7) < 10
This means that our quotient is smaller than 10, then the first digit of the quotient can not be on the tens place.
Then Meaghan is the correct one.
We also could perform the quotient to find:
43.61/7 = 6.23
So yes, Meaghan is correct.